职业生涯规划的特征包括：个性化特征、（）、开放些特征。
参考答案：适时性特征
已知x2+bx+c＜0的解集是{x|1＜x＜3}，则b+c等于______．
Melville is best-known as the author of his mighty book,(),which is one of the world’s greatest masterpieces.
A. Song of Myself
B. Moby-Dick
C. The Marble Faun
D. Mosses from an Old Manse
